Johnson Residence Loft & Patio Structural Design
Project: Johnson Residence Loft & Patio Structure
Client: Direct Input LLC
My Role: Supplemental Structural Consultant
The Challenge: Verifying As-Built Geometry
This project involved the structural validation of a new interior loft and a detached outdoor patio structure. The primary challenge was confirming that the unique architectural features, specifically 17-foot tall wood stud walls and an open-frame timber patio, met current building codes. To accommodate a fast-track timeline, I analyzed specific as-built conditions to ensure they could resist out-of-plane wind loads and seismic forces with minimal modification.
The Engineering Solution
I was retained by the client to supplement the Engineer of Record, providing forensic engineering services to validate specific structural elements and produce the structural detailing required for permitting.
Tall Wall Analysis: I performed a comprehensive slenderness analysis on the existing 17-foot stud framing, confirming it had sufficient capacity for combined axial and lateral loads.
Retrofit Detailing: For the detached patio, I evaluated the glulam post-and-beam system and identified areas requiring enhanced connections. I validated custom knee bracing and specified rafter ties to bring the lateral system into compliance.
Plan Check Support: I joined the project during the plan check phase to assist the design team in securing permits. I communicated directly with the plan checker to expedite the process and ensure compliance.
